A kimono can be worn by both men or women. The biggest difference here is that men’s kimonos are often worn in darker colors - such as a dark navy or a black. Also unlike women’s kimonos (which can be worn every day), men usually wear kimonos for special events. The male kimono style is also built differently.
For example, a female kimono typically has long and deep sleeves that function just like regular sleeves on a dress. A male kimono has sleeves that are attached to the kimono from the armhole to a few inches above the wrist. However, as with most fashions these days, there is also a range of casual male kimonos that can be worn for everyday use. They often have lighter purples, greens, and blues for the color and perhaps a texture or a soft pattern on the fabric.
Yes, Japanese kimonos are worn by men, often on formal occasions and in dark or sombre colors, unpatterned, unlike women's kimonos.
Men usually wear the pants part of the one-two or three piece garment, and their collars have little space between the tops and the neck, i.e. worn much higher than women's.